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EC number: 604-012-2 | CAS number: 137296-15-2
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2017-02-22 to 2017-03-22
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.61 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0.92 Pa
- Conclusions:
- The vapour pressure of Ammonium-(S)-lactate is 0.61 Pa at 20 °C and 0.92 Pa at 25 °C.
- Executive summary:
The vapour pressure of Ammonium-(S)-lactate was determined according to OECD Guideline 104. As the test material started to decompose at 135 °C, the vapour pressure was calculated between 60 °C and 120 °C. At 20 °C, the substance Ammonium-(S)-lactate has a vapour pressure of 0.61 Pa.
Reference
The weight losses of the analysed sample are given in the following table:
| Measured Temperature | Weight Loss vT | log (|vT|) | log(pV) | Vapour pressure pV | 1/T |
| [°C] | [mg/min] | [-] | [log (Pa)] | [Pa] | [1/K] |
| 59.9 | -5.11E-03 | -2.29 | 1.09 | 12.2 | 3.00E-03 |
| 74.9 | -1.00E-02 | -2.00 | 1.37 | 23.4 | 2.87E-03 |
| 89.8 | -2.50E-02 | -1.60 | 1.75 | 56.5 | 2.76E-03 |
| 105 | -6.50E-02 | -1.19 | 2.15 | 142 | 2.65E-03 |
| 120 | -1.31E-01 | -0.88 | 2.45 | 279 | 2.55E-03 |
| 135 | -1.38E-01 | -0.86 | 2.47 | 293 | 2.45E-03 |
| 150 | -9.90E-02 | -1.00 | 2.33 | 213 | 2.36E-03 |
The test material started to decompose at 135 °C and therefore the vapour pressure was calculated between 60 °C and 120 °C. The calculated mass loss within this temperature range is 7.1 mg (corresponds to 33.1 %), which results in a vapour pressure of 0.61 Pa at 20 °C and 0.92 Pa at 25 °C.
Description of key information
The vapour pressure of Ammonium-(S)-lactate was determined according to OECD guideline 104. As the test material started to decompose at 135 °C, the vapour pressure was calculated between 60 °C and 120 °C. At 20 °C, the substance Ammonium-(S)-lactate has a vapour pressure of 0.61 Pa.
Key value for chemical safety assessment
- Vapour pressure:
- 0.61 Pa
- at the temperature of:
- 20 °C
Additional information
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